Guys,
I've got about 10 years on the 734's.( no jettison)
During sim checks, they like to point out both scenarios.
Occasions when you have the luxury of time, you of course reduce your landing weight.
When as the Commander, YOU DECIDE, that you have to land ASAP, then the landing weight becomes secondary, and a postflight issue. There is literature explaining and suggesting techniques for this scenario, ie an overweight landing.
I have , on occasion, when the actual TKOF weight is high, discussed and briefed and identified the procedure from the manuals at the preflight stage.
Techniques may differ between model and make, and it is important to realise this and be familiar with it.
I would not confine it to any specific scenario. Good judgement, that hopefully comes with that fourth bar, should be sufficient.